Brake



April zo, 1937.

c. E; BUDD BRAKE Original Filed Sept. 28,- 1953 A TTORNEY y, PatentedApr. 20, 1937 BRAKE Clarence E. Budd, ySouth Bend, Ind., assigner toBendix Aviation Corporation, South Bend, Ind., a corporation of DelawareOriginal application September 28, 1933, Serial 691,361. Divided andthis application February 5, 1936, Serial N0. 62,399

4 Claims.

This invention relates' to brakes, and is illustrated as embodied in aninternal expanding brake for an automobile wheel.

An object of the invention is to provide an inexpensive and rigidstructure adapted to serve as an adjustable brake anchorage. In onedesirable arrangement two parts, secured one over the other to the brakebacking plate, are formed to provide sockets for thrust members engagingl0 the ends of the brake shoes, and to support an adjustment deviceacting on the ends of the thrust members. Y A

Preferably the adjustment device is operable from outside the backingplate. The illustrated form includes a stem threaded adjustably throughone of the parts secured to the backing plate, and carrying a cone orthe like arranged to wedge apart the ends of the thrust members.

Various features of novelty relate to the form and arrangement of theabove-described two anchorage parts, and to other novel combinations anddesirable particular constructions which will be apparent from thefollowing description of the illustrative embodiment shown in the.accompanying drawing, in which: l

Figure 1 is a vertical section through the brake, just inside the headof the brake drum, and showing the brake shoes in side elevation;

Figure 2 is a partial section, on the line 2 2,

showing the two superposed anchorage parts se- 'cured to the backingplate;

Figure 3 is a side elevation of one of said parts; and

Figure 4 is a side elevation of the other of said parts.

The illustrated brake-includes a drum I0, a backing plate I2 arranged atthe open side of the drum, and friction means (illustrated as comprisingtwo shoes I4 and I6) within the drum.

' 40 The shoes i4 and I6 are adapted to be spread apart, to apply thebrake, by means such as a cam lever I8 having lugs 20 vand 22 interposedbetween the ends of the shoes, and shown with a cut-out portion23valigned with a positioning 45 pin or stop 24 engaged by the ends ofthe shoes when the brake is released.

The lever I8 has at its upper end a hook 26 connected to a tensionelement such as a cable 28 forming part of a Bowden-type control by 50which the brake is operated.

The opposite ends of the shoes I4 and I6 are pivotally connected tothrust members such as pointed strut links 3U and 32 respectively. Theselinks are guided by a novel housing which, ac-

55, cording to an important feature of the present in- (Cl. 18S-79.5)

vention, comprises two separately-formed. cooperating parts such as astamping 34 and a forgof the shoes.

The forging 36 is secured, as for example by rivets, to the backingplate I2, and the stamping 34, in the form illustrated, is adapted to besecured to the forging by means such as welds 42.

'I'hus it will be seen that in the braking operation the shoe which doesmost of the braking anchors through its strut link on the wedge 38 andthence through the forging 36 on the backing plate I2.

Return springs 44 and 46 are shown arranged to return the shoes tonormal releasedpositions when tension on the element 28 is relieved.

When the operator desires to apply the brake, he pulls on the tensionelement 28, rocking the lever I 8, and spreading the shoes I 4 and I6against the drum. The lever I8 may float vertically with the. movementsof the shoes I4 and I6. The shoes anchor,v as described above, throughthe adjustable wedge 38. When necessary to adjust the shoes for wear,the wedge 38 is screwed in to spread apart the anchored ends of theshoes.

While one illustrative brake has been described in detail, it is not myintention to limit the scope of my invention to that brake, or by thatdescription, or otherwise than by the terms of the ap-v pended claims.The present application is a division of my application No. 691,361,flied September 28, 1933.

I claim:

1. A brake comprising a drum, a backing plate,

v a pair of shoes therein, a strut link pivoted to an end of each shoe,and a housing for the strut links comprising a forging seated againstthe backing plate and a stamping enveloping the forging except for theside engaging the backing plate, the forging and stamping being formedto provide between them sockets for the link's.

2. A brake comprising a drum, a backing plate, a pair of shoes therein,a strut link pivoted to an end of each shoe. and a housing for the strutlinks comprising a forging anda stamping secured to the backingplate,said forging being 10 guideways for the strut links.

4. A brake comprising a drum, a backing plate, a pair of shoes therein,a strut link pivoted to an end of each shoe, and a housing for the strutlinkscomprisingv a. forging and a stamping secured to the backing plate,said forging being formed with grooves and said stamping with partsoverlying the grooves, said grooves and parts forming a pair ofguideways for the strut links, and said brake being provided with anadjusting wedge extending perpendicularly to the guideways, and saidforging and stamping being provided wit'h aligned openings for thereception 10 of said adjusting wedge.

CLARENCE E. BUDD.

